Implement route from MessageData to MessageInfo on the client
Summary: This differential mimics the keyserver logic for getting from MessageData to MessageInfo on the client
Test Plan:
- Flow
- Next diff will enable testing this one more thoruoghly.
Reviewers: kamil, tomek
Reviewed By: kamil
Subscribers: ashoat
Differential Revision: https://phab.comm.dev/D12463